CN107056041A - A kind of method that prefabricated rods draw bipyramid - Google Patents
A kind of method that prefabricated rods draw bipyramid Download PDFInfo
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- CN107056041A CN107056041A CN201710304851.9A CN201710304851A CN107056041A CN 107056041 A CN107056041 A CN 107056041A CN 201710304851 A CN201710304851 A CN 201710304851A CN 107056041 A CN107056041 A CN 107056041A
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- Prior art keywords
- prefabricated rods
- draws
- bipyramid
- blowtorch
- preform
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/01251—Reshaping the ends
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention provides a kind of method that preform draws bipyramid, it is characterised in that comprises the following steps：1) warm：Prefabricated rods are fixed on two fixtures of operating platform, it is ensured that prefabricated rods are horizontal；Opening blowtorch alignment draws tapering position to carry out pre-burning, until skin glass is in molten condition；2) cone process is drawn：It is divided into N number of stage stretching：When prefabricated rods skin glass is in molten condition, slow movable clamp when the distance of left and right fixture is increased to setpoint distance, stops fixture movement, and this is first stage stretching；Blowtorch is aligned into the maximum position of prefabricated rods reducing to continue to heat, movable clamp repeats the operation of first stage, and this is stretched for second stage；So repeatedly, until completing the stretching in N stages；Be then shut off blowtorch, prefabricated rods drawing wimble fraction continued to be placed in holding furnace, slow cooling for a period of time after, with glass cutter from draw cone it is most thin from cut off, two sections are drawn to prefabricated rods removal holding furnace bore, cooling is stand-by.
Description
Technical field
The present invention relates to preform technical field, a kind of method that bipyramid is drawn in particular to prefabricated rods.
Background technology
Preform is mainly heated to after molten condition draw from lower end by drawing optical fibers production process by fiber drawing furnace
Go out optical fiber.For effective wire drawing, the loss amount for the prefabricated rods that reduction wire drawing is started shortens the time of prefabricated rods pyrometric cone shaping,
Before wire drawing, streamlined conehead generally is made in the initiating terminal of prefabricated stick drawn wire.
In the prior art, it is by a preform and one preform one end to be pulled into tapered processing method
Quartz pushrod, or with two preforms, on welding lathe being heated to interface is welded together, and then passes through molten bed
Dragging separation, streamlined cone is pulled into by preform one end.This method has defect：When the external diameter of prefabricated rods is larger
When, the streamlined conehead operation of pull-out is highly difficult, simultaneously because needing an other rod to do drawing bar carries out drawing cone, therefore can pull off
A part of prefabricated rods, cause the waste of material.
Chinese patent CN201210498530.4 discloses a kind of drawing cone processing method of preform：Two are waited to draw
The preform for boring processing is corresponded in the two ends for being clamped in beading lathe, mobile two preform to burner hearths respectively
After heating reaches softening point, two preforms are welding together, then drag beading lathe chuck it is relatively reverse
It is mobile, pull out streamline cone.The prior art makes the drawing cone glass loss amount of preform decline 6%, solves to a certain extent
Loss problem is bored in drawing of having determined, but does not solve the problems, such as the drawing cone loss of preform fundamentally.
Chinese patent CN201510701454.6 discloses a kind of drawing cone method of preform, comprises the following steps：
Preform and quartz pushrod are corresponded to the two ends for being clamped in beading lathe respectively, moves to and is preheated in burner hearth, use stone
Black plate presses inward against the front end face of preform so that V-shaped groove at the position, then by quartz pushrod and preform
Welding, outwards draws quartz pushrod, becomes larger V-groove, the center of mobile blowtorch calcination V-groove all the time, when V-groove most
Thin place's diameter draws the diameter proportion before cone to be 1 with preform:9‐1:When 6, stop traction quartz pushrod.The prior art is provided
Drawing cone method can reduce preform draw cone during quartz pushrod loss, reduction optical fiber preform conical head drawing cone damage
Consumption；But also bore loss without the drawing for fundamentally solving the problems, such as preform.
It can be seen that, in the drawing conehead process of preform, how to be prevented effectively from the loss of prefabricated rods, it has also become a technology
Problem.
The content of the invention
To overcome in the prior art, prefabricated rods are in the loss problem for drawing cone process to cause, and the invention provides a kind of new light
Fine prefabricated rods draw cone method, and using technical scheme, the loss of prefabricated rods is almost nil, can thoroughly solve prefabricated rods
Loss problem during cone is drawn.
The technical scheme is that：A kind of method that preform draws bipyramid, it is characterised in that including following step
Suddenly：
1) warm：Prefabricated rods are fixed on two fixtures of operating platform, it is ensured that prefabricated rods are horizontal；Open
Opening blowtorch alignment draws tapering position to carry out pre-burning, until skin glass is in molten condition；
2) cone process is drawn：It is divided into N number of stage stretching：When prefabricated rods skin glass is in molten condition, slow mobile folder
Tool, when the distance of left and right fixture is increased to setpoint distance, stops fixture movement, and this is first stage stretching；Blowtorch is aligned
The maximum position of prefabricated rods reducing continues to heat, and movable clamp repeats the operation of first stage, and this is stretched for second stage；Such as
This repeatedly, until complete the N stages stretching；Blowtorch is then shut off, prefabricated rods drawing wimble fraction is continued to be placed in holding furnace, delayed
After slow cooling a period of time, with glass cutter from draw cone it is most thin from cut off, two sections are drawn to prefabricated rods removal holding furnace bore, cooled down
It is stand-by.
By such scheme, the fixture is fixed on the two ends of preform, and the fixture is claw.
By such scheme, the preform is 1, it is not necessary to use other prefabricated rods or glass bar as traction
Rod.
By such scheme, the warm and drawing cone process draw wimble fraction to be constantly in holding furnace, the holding furnace
It is made of quartz material；The holding furnace is made up of double-deck quartz material, and inside is hollow structure.Pacify in the holding furnace
Equipped with blowtorch.
By such scheme, the drawing tapering position is selected in the non-two-end part of preform, the preferably centre in prefabricated rods
Position.
By such scheme, the warm is divided into two stage progress：I.e. gradually to open two blowtorch pre- for warm
Burn, first blowtorch pre-burning 5-15 minutes of unlatching first, be then then turned on second blowtorch and continue pre-burning 20-40 minutes.
By such scheme, to make homogeneous heating, the burn-in process makes prefabricated rods be in Rotating with Uniform state.The rotation
Rotary speed is more than 30 revs/min, preferably 50 revs/min.
By such scheme, as a kind of optional embodiment of the present invention, described two blowtorch are same in holding furnace
On individual position；As another optional embodiment of the present invention, described two blowtorch are in approximately the same plane, two blowtorch
Injection direction and prefabricated rods angle 30-60 degree, preferably 40-50 degree, further preferred 45 degree.
By such scheme, the lamp holder of the blowtorch and the distance of prefabricated rods are 40-60mm, preferably 50mm.
By such scheme, two fixture to the tensile force of preform for that can set up power, the tensile force it is big
Small range is 14-17 oxen, preferably 15 Ns.
By such scheme, the stretching distance of the drawing cone each phase sets of process is 15-25mm, each stage
The torch firing time is 3-5min.The N takes 3 or 4.
By such scheme, the prefabricated rods draw wimble fraction to be 18-20min in the soaking time of holding furnace.
By such scheme, a diameter of 150-250mm of the prefabricated rods completes after the N sections of stretching, draws the rod footpath at cone
Reach 15-16mm.
By such scheme, the preheating and drawing cone process are using propane and the combustion system of oxygen, its propane：The body of oxygen
Accumulating ratio is：60：250.
Compared with prior art, the beneficial effects of the invention are as follows：
1) present invention draws bipyramid mode using level, and fixture is controllable to the size of prefabricated rods horizontal pull and constant, pulls out
Tapering length and tapering shape it is uniform, uniformity is good, it is to avoid vertical drawing process tapering caused by the difference of rod gravity
The problem of length and shape are difficult to control to.
2) preform of the invention draws bipyramid method, during cone is drawn, the either drawing of prefabricated rods or sleeve pipe
Cone process, has all accomplished that " zero " is lost, has not wasted any glass materials, effectively raise the utilization rate of prefabricated rods substantially.
And the conehead stress distribution pulled into is uniform, the core bag ratio of optical fiber is not interfered with follow-up drawing process so that optical fiber is started
Partial scrapping is substantially reduced.
3) preform of the invention draws bipyramid method, and drawing tapering position, one are used as from preform middle part
It is secondary to pull out two coneheads, and do not need drawing bar to be that can be achieved to draw cone, technique is simplified, raw material are saved, is lifted
Draw cone efficiency.
4) present invention is regulated and controled by temperature adjusting and tensile force, realized from the mode for preheating, stretching stage by stage stage by stage
A kind of new drawing process, this method is particularly suitable for the drawing cone of large scale diameter preform, and draw cone speed it is fast,
Properties of product are stable.
Brief description of the drawings
Fig. 1 is the schematic diagram of warm of the present invention；
Fig. 2 is that the present invention draws cone schematic diagram；
Fig. 3 is the schematic diagram after the present invention draws cone repeatedly.
Description of reference numerals：1 is claw, and 2 be prefabricated rods, and 3 be lamp holder.
Embodiment
Below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described herein
Specific embodiment only to explain the present invention, is not intended to limit the present invention.
In the prior art, preform draws cone to need to use drawing bar, and drawing bar is being melted with prefabricated rods and drawn again
, it is necessary to pull off a part of preform during stretching, the birth defect of this technique, which result in one kind, effectively to be solved
Prefabricated rods are drawing the phenomenon that turns around of cone process.
Therefore, and the present invention devises a kind of easy, quick, efficient prefabricated rods and draws cone method.
Embodiment 1
A kind of method that preform draws bipyramid, comprises the following steps：
1) warm, as shown in Figure 1：Prefabricated rods are fixed on two fixtures of operating platform, it is ensured that prefabricated rods are in
Horizontal level；Opening blowtorch alignment draws tapering position to carry out pre-burning, until skin glass is in molten condition；
2) cone process is drawn, as shown in Figure 1：The process is divided into N number of stage stretching：Molten is in prefabricated rods skin glass
During state, slow movable clamp when the distance of left and right fixture is increased to setpoint distance, stops fixture movement, this is the first stage
Stretching；Blowtorch is aligned into the maximum position of prefabricated rods reducing to continue to heat, movable clamp repeats the operation of first stage, this is
Second stage is stretched；So repeatedly, until completing the stretching in N stages.
As shown in figure 3, closing blowtorch, prefabricated rods drawing wimble fraction is continued to be placed in holding furnace, slow cooling is for a period of time
Afterwards, with glass cutter from draw cone it is most thin from cut off, two sections are drawn to prefabricated rods removal holding furnace bore, cooling is stand-by.
In such scheme, fixture is fixed on the two ends of preform, and fixture can be claw.
In such scheme, preform is 1, it is not necessary to use other prefabricated rods or glass bar as drawing bar.
Draw tapering position to be selected in the non-two-end part of preform, preferably the middle part in prefabricated rods, tapering position is drawn in the prior art
Two ends are selected in, and need drawing bar, this operating procedure is easily controlled, but has waste.The choosing of tapering position is being drawn in present invention selection
In the middle of prefabricated rods, although so having tightened up requirement in the stationarity of the temperature of technique, heat time, tensile force,
Operation is simplified, efficiency is improved.
In the warm and drawing cone process of technical scheme, the drawing wimble fraction of preform is constantly in guarantor
In warm stove, holding furnace is made of quartz material.Holding furnace can also be arranged to double-deck quartz material, and inside is hollow structure,
Such better heat preservation.Blowtorch is installed in holding furnace.
The drawing cone process of prior art is that since one end of prefabricated rods, this is determined by the limitation of existing process
, the drawing for diameter than larger prefabricated rods is bored, and existing equipment, can only be from rod due to the limitation of flame temperature and heat-retaining condition
One end pull-up because from the end face torch firing of prefabricated rods, such contact surface, can be quickly by rod scorification, in case next than larger
The drawing cone in stage.But this to draw cone technique to be obviously not suitable for large size prefabricated rod middle part drawing cone, reason has some：One is fire
Flame temperature not enough, is burnt and does not melt large-sized solid bar；But without related thermal insulation matched equipment, temperature keeps not living；Three are
From the middle torch firing of rod, the control to temperature, tensile force, internal stress requires more accurate, is otherwise possible to that prefabricated rods can be drawn
Into waste product.And technical scheme proposed by the present invention, cone is drawn from centre, traditional drawing cone mode has been overturned and has drawn cone technique, is utilized
Holding furnace makes the temperature of flame constant in certain limit, to tensile force regulate and control, it is ensured that the internal stress of preform it is uniform.
The drawing bipyramid process of the present invention, seems the adjustment of simple drawing tapering position, substantially proposes a kind of brand-new drawing cone technique.
In the technique of the present invention, related drawing cone equipment and traditional handicraft are also differed, so, the present invention is actually same
When it is also proposed a kind of new drawing cone equipment.In embodiments of the present invention, the design of holding furnace has special requirement, if
Timing can take into account the key elements such as the temperature of flame, the size of prefabricated rods.Prefabricated rods for diameter dimension in 150-250mm are come
Say, the zone of reasonableness of the design of holding furnace is proper in long 60-80cm, high 40-60cm, width 40-60cm.Such as of the invention
One embodiment, holding furnace is designed and sized to long 70cm, high 50cm, width 50cm.
Warm is divided into two stage progress：I.e. warm gradually opens two blowtorch pre-burnings, first opens first
Blowtorch pre-burning 5-15 minutes, is then then turned on second blowtorch and continues pre-burning 20-40 minutes.So operation is prefabricated in order to control
The heating rate of rod, it is to avoid the too fast internal stress skewness for causing prefabricated rods of heating, caused by prefabricated rods performance it is not good,
The possibility that rod body is burst.
To make homogeneous heating, the burn-in process makes prefabricated rods be in Rotating with Uniform state.Rotary speed be more than 30 turns/
Minute, such as at 30-80 revs/min, a preferred embodiment rotary speed of the invention is set as 50 revs/min.
In heating process, two blowtorch are on the same position in holding furnace；Certainly, two blowtorch can also set one
Two blowtorch, such as be arranged in approximately the same plane by fixed angle, and the injection direction of two blowtorch is relative in 180 degree；Can be with
The angle of the injection direction of two blowtorch and prefabricated rods is set between 30-90 degree, preferably 40-50 degree, the present invention one is excellent
The embodiment fixture of choosing is set as 45 degree.
In such scheme, the lamp holder of blowtorch and the distance of prefabricated rods are 40-55mm, preferably 50mm.Two fixtures are to light
The tensile force of fine prefabricated rods is can set up power, and the magnitude range of the tensile force is 14-17 oxen.Cone process each stage is drawn to set
Fixed stretching distance is 15-25mm, and the torch firing time of second stage to N stages is 3-5min.Prefabricated rods draw wimble fraction protecting
The soaking time of warm stove is 18-20min.
A diameter of 150-250mm of prefabricated rods, completes after the N sections of stretching, draws the rod footpath at cone to reach 15-16mm.
In order to allow prefabricated rods to be preferably heated, the heat for drawing wimble fraction evenly, is reduced because heat inequality is made when drawing cone
Into internal stress, preheating and draw cone process using propane and the combustion system of oxygen, its propane：The volume ratio of oxygen is：60：
250。
Embodiment 2
A kind of method that preform draws bipyramid, comprises the following steps：
As shown in figure 1, warm：Prefabricated rods are clipped in the claw at two ends first, the level of prefabricated rods are confirmed, by lamp holder
Alignment is needed to draw the position of cone, and prefabricated rods are preheated using the combustion system of propane oxygen, lamp holder and prefabricated rods away from
From being optimal using 50mm, during preheating, first by a lamp holder pre-burning, after 8-10min, second lamp holder is opened, continues to increase
The temperature of prefabricated rods, enables temperature gradually to permeate, after 25-30min, confirms that prefabricated rods skin glass is in molten condition
Afterwards, start to draw cone.
As shown in Fig. 2 drawing cone process：After fixed left side claw, mobile the right claw, mobile 18-20mm, locked claw,
Lamp holder is continued to continue to heat against the maximum position of prefabricated rods reducing, after 3-5min, the operation before repeating again, according to rod
The difference in footpath, after 3-4 movement, draws the rod footpath at cone to basically reach 15-16mm.
As shown in Figure 3：Close lamp holder and remove, wimble fraction will be drawn to be placed on slow cooling in holding furnace, it is to avoid directly remove
Cooling is too fast to cause tapering stress excessive.After 18-20min, you can cut off using glass cutter from most thin place at drawing cone, and two are saved
Draw the prefabricated rods bored to remove holding furnace, cool down stand-by.
In order to confirm that the method draws the conehead situation of cone, conehead diameter is confirmed using slide measure.And use stress gauge
Check the stress distribution of two coneheads.From the point of view of testing result, conehead diameter 15-16mm, the stress distribution in tapering is also very equal
It is even, can ensure to be not in due to the fried cone problem that tapering stress is caused, secondly in wire drawing during wire drawing is turned around first
During, the core bag ratio of optical fiber is also ensure that well so that optical fiber scrapping for part of starting substantially reduces.
The preform of the present invention draws bipyramid method, from preform middle part as tapering position is drawn, is not required to
It is that can be achieved to draw cone to want drawing bar, simplifies technique, saves raw material.During cone is drawn, either prefabricated rods still cover
The drawing cone process of pipe, has all accomplished that " zero " is lost, has not wasted any glass materials, effectively raise the profit of prefabricated rods substantially
With rate.
The preferred embodiments of the present invention have shown and described in described above, as previously described, it should be understood that not office of the invention
Be limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations, modification and
Environment, and can be changed in invention contemplated scope described herein by the technology or knowledge of above-mentioned teaching or association area
It is dynamic., then all should be appended by the present invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In scope of the claims.
Claims (10)
1. a kind of method that preform draws bipyramid, it is characterised in that comprise the following steps：
1) warm：Prefabricated rods are fixed on two fixtures of operating platform, it is ensured that prefabricated rods are horizontal；Open spray
Lamp alignment draws tapering position to carry out pre-burning, until skin glass is in molten condition；
2) cone process is drawn：It is divided into N number of stage stretching：When prefabricated rods skin glass is in molten condition, slow movable clamp makes
When the distance of left and right fixture increases to setpoint distance, stop fixture movement, this is stretched for the first stage；Blowtorch is directed at prefabricated rods
The maximum position of reducing continues to heat, and movable clamp repeats the operation of first stage, and this is stretched for second stage；So repeatedly,
Until completing the stretching in N stages；Blowtorch is then shut off, prefabricated rods drawing wimble fraction is continued to be placed in holding furnace, slow cooling
After a period of time, with glass cutter from draw cone it is most thin from cut off, two sections are drawn to prefabricated rods removal holding furnace bore, cooling is stand-by.
2. the method that preform according to claim 1 draws bipyramid, it is characterised in that：The preform is 1
Root, the fixture is fixed on the two ends of preform.
3. the method that the preform according to claim any one of 1-3 draws bipyramid, it is characterised in that：The drawing tapering
Position is not or not the two ends of preform.
4. the method that preform according to claim 1 draws bipyramid, it is characterised in that：The warm is divided into two
The individual stage is carried out：After first blowtorch pre-burning 5-15 minutes of unlatching first, it is then turned on second blowtorch and continues pre-burning 20-40 minutes.
5. the method that preform according to claim 1 draws bipyramid, it is characterised in that：The burn-in process, makes pre-
Rod processed is in Rotating with Uniform state.
6. the method that preform according to claim 4 draws bipyramid, it is characterised in that：The injection side of two blowtorch
To the angle 30-60 degree with prefabricated rods.
7. the method that preform according to claim 1 draws bipyramid, it is characterised in that：The lamp holder of the blowtorch with it is pre-
The distance of rod processed is 40-60mm.
8. the method that preform according to claim 1 draws bipyramid, it is characterised in that：The drawing cone process, it is each
The stretching distance of phase sets is 15-25mm, and the torch firing time is 3-5min.
9. the method that preform according to claim 1 draws bipyramid, it is characterised in that：The N is 3 or 4.
10. the method that preform according to claim 1 draws bipyramid, it is characterised in that：The prefabricated rods draw tapering
The soaking time divided in holding furnace is 18-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710304851.9A CN107056041A (en) | 2017-05-03 | 2017-05-03 | A kind of method that prefabricated rods draw bipyramid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710304851.9A CN107056041A (en) | 2017-05-03 | 2017-05-03 | A kind of method that prefabricated rods draw bipyramid |
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| Publication Number | Publication Date |
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| CN107056041A true CN107056041A (en) | 2017-08-18 |
Family
ID=59596875
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710304851.9A Pending CN107056041A (en) | 2017-05-03 | 2017-05-03 | A kind of method that prefabricated rods draw bipyramid |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896737A (en) * | 2019-04-17 | 2019-06-18 | 江苏通鼎光棒有限公司 | A kind of efficient prick-drawing device and method for large-scale optical fiber prefabricating stick |
| CN109928614A (en) * | 2019-03-29 | 2019-06-25 | 华中科技大学 | A kind of preparation method of conical fiber |
| CN110668691A (en) * | 2019-10-08 | 2020-01-10 | 烽火通信科技股份有限公司 | Processing device and processing method for prefabricated rod conical head |
| CN112748495A (en) * | 2021-02-03 | 2021-05-04 | 厦门大学 | Device and method for preparing low-loss high-strength tapered optical fiber |
| CN113387558A (en) * | 2021-06-30 | 2021-09-14 | 杭州富通通信技术股份有限公司 | Processing technology of prefabricated rod |
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| CN1180998C (en) * | 2001-11-06 | 2004-12-22 | 北京康润强光电子技术有限责任公司 | Optical fiber cone drawing technology and equipment |
| JP2005200238A (en) * | 2004-01-13 | 2005-07-28 | Shin Etsu Chem Co Ltd | Apparatus for working glass rod for optical fiber and method of narrowing down end part of glass rod |
| CN102923941A (en) * | 2012-11-29 | 2013-02-13 | 长飞光纤光缆有限公司 | Method for tapering optical fiber preform |
| CN105271702A (en) * | 2015-10-26 | 2016-01-27 | 江苏亨通光电股份有限公司 | Tapering method for optical fiber preform |
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|---|---|---|---|---|
| CN1180998C (en) * | 2001-11-06 | 2004-12-22 | 北京康润强光电子技术有限责任公司 | Optical fiber cone drawing technology and equipment |
| JP2005200238A (en) * | 2004-01-13 | 2005-07-28 | Shin Etsu Chem Co Ltd | Apparatus for working glass rod for optical fiber and method of narrowing down end part of glass rod |
| CN102923941A (en) * | 2012-11-29 | 2013-02-13 | 长飞光纤光缆有限公司 | Method for tapering optical fiber preform |
| CN105271702A (en) * | 2015-10-26 | 2016-01-27 | 江苏亨通光电股份有限公司 | Tapering method for optical fiber preform |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109928614A (en) * | 2019-03-29 | 2019-06-25 | 华中科技大学 | A kind of preparation method of conical fiber |
| CN109896737A (en) * | 2019-04-17 | 2019-06-18 | 江苏通鼎光棒有限公司 | A kind of efficient prick-drawing device and method for large-scale optical fiber prefabricating stick |
| CN110668691A (en) * | 2019-10-08 | 2020-01-10 | 烽火通信科技股份有限公司 | Processing device and processing method for prefabricated rod conical head |
| CN110668691B (en) * | 2019-10-08 | 2022-04-15 | 烽火通信科技股份有限公司 | Processing device and processing method for prefabricated rod conical head |
| CN112748495A (en) * | 2021-02-03 | 2021-05-04 | 厦门大学 | Device and method for preparing low-loss high-strength tapered optical fiber |
| CN113387558A (en) * | 2021-06-30 | 2021-09-14 | 杭州富通通信技术股份有限公司 | Processing technology of prefabricated rod |
| CN113387558B (en) * | 2021-06-30 | 2022-09-23 | 杭州富通通信技术股份有限公司 | Processing technology of prefabricated rod |
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Application publication date: 20170818 |